How can I just get the corner points in the 3D model?(PDE Toolbox)

Hi everyone!

when I use the syntax "findNodes(mesh,'region','face',18)", I get the corner points and the middle points. So How can I just get the corner points?

Any help would be appreciated.

Thanks

Answer 1

[Ravi Kumar]

Hi Haoran,

It looks like you are interested in nodes that form the triangle element corners and not the midside nodes. Two options:

1. You can generate a linear mesh, if you don't need quadratic accuracy.
2. You can pick the first three of the six rows in the output.

Regards,

Ravi

[haoran liu]

Thank you! But I need accuracy. :D

[Ravi Kumar]

In my comment, option 2 refers to quadratic mesh. You can pick the first three rows of quadratic element, they are the corner nodes.

[haoran liu]

I think, the first four rows is the corner points, because there are ten points in a element.

[Ravi Kumar]

OK, I am unlcear about your approach. I assumed you are workting with 2-D model. You are right, its the first four in 3-D.

[haoran liu]

Thank you for answer my question!